LAS → SFO Flight Reliability

Right now

Origin · LASNo disruption reported

Aviation weather is not currently a factor.

Updated 07:56 UTC

Las Vegas airport profile →

Destination · SFONo disruption reported

Aviation weather is not currently a factor.

Updated 07:56 UTC

San Francisco airport profile →

Route reliability

July 2023 – July 2026

Route Reliability Score

49/ 100Fair

Better than 13% of comparable major US routes (4,598 compared)

Calculated from 18,262 flights. How this is calculated

On-time arrivals

66.4%

11,990 of 18,064

Cancellation rate

1.01%

185 cancelled

Median arrival delay

0 min

Average 14.5 min

Severe delays

10.6%

60+ minutes late

Delay when late

60 min

Average, when 15+ min late

Flights analyzed

18,262

5 carriers

LAS → SFO arrives on time 66.4% of the time; the return trip, SFO → LAS, arrives on time 73.3% of the time, a 6.9-point gap between the two directions of the same city pair.

LAS → SFO spends 31.8 minutes on the ground on a 414-mile trip: 23.6 minutes from pushback to wheels-up at LAS and 8.2 minutes from touchdown to gate at SFO.

Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026

What stands out

Reliability on this route has fallen unusually sharply over the past year, a bigger swing than 96% of 5,368 comparable routes.

60.6% on time over the most recent 12 months (2025-08 to 2026-07), against 73.2% in the 12 months before (2024-08 to 2025-07), a change of 12.6 points.

Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · Ranked against every other route with the same kind of figure and at least 5,368 in the comparison.

Why LAS → SFO flights are cancelled

July 2023 – July 2026

LAS → SFO cancelled 185 of 18,262 scheduled flights — about 1 in every 99. The reason filed most often was the airline, 69.7% of the cancellations coded on this route — about 1 in every 142 scheduled flights.

Share of cancellations

Airline69.7%

Weather21.6%

Air traffic8.6%

Security0.0%

Of 185 cancelled departures carrying a reason code.

What each reason means

The airline1 in 142

Crew, maintenance, aircraft cleaning, baggage or fueling: what BTS counts as within the carrier’s own control.

129 cancellations, 69.7% of the total.

Extreme weather1 in 457

Conditions the carrier judged severe enough to stop the flight: a blizzard, a hurricane, a line of thunderstorms.

40 cancellations, 21.6% of the total.

The air traffic system1 in 1,141

Airport capacity, air traffic control flow programs, heavy traffic and ordinary bad weather. A system decision, not the airline’s.

16 cancellations, 8.6% of the total.

Security—

A terminal evacuation, a security breach, screening equipment failure, or screening queues over 29 minutes.

0 cancellations, 0.0% of the total.

Reason codes are the operating airline’s own filing with US DOT, not an independent finding of fault. Ordinary bad weather is filed under air traffic, so weather’s full share is larger than its bar.

185 coded cancellations were recorded on LAS → SFO; the section appears from 50.

When it goes wrong

July 2023 – July 2026

One arrival in ten is worse than

61 min late

against a median of 0 min early

Arrived an hour or more late10.6%

Typical delay when late60 min

Cancelled1.01%

Landed somewhere else0.07%

LAS → SFO has an average that understates its risk: a typical arrival is 0 min early, but the worst tenth are 61 minutes worse than that. If the trip has something unmissable at the end of it, the median is the wrong number to plan against.

Percentiles over 18,262 operations; cancelled and diverted flights are counted separately.

Will your connection be tight enough?

Layovers at SFO after arriving from LAS.

Connection buffer and chance of missing by layover length, LAS → SFO arrivals
Connection time	Chance of missing	Reads as
30 min	50%	Likely to miss
45 min	33%	Likely to miss
60 min	22%	High risk
90 min	10%	Some risk
120 min	5.8%	Some risk

This is one leg of a connection. Gate changes and the next flight's own schedule matter too. And a connection can fail before delay is even the question — this route cancels 1.01% of the time and diverts 0.07% of the time, which a late arrival never shows up in.

Chance of missing is the share of 18,064 arrivals on this route that landed later than the connection time less 30 minutes to reach the next gate.

The worst tenth of arrivals on this route land at least 61 minutes late (90th-percentile gate arrival delay), over 18,262 operations.

Any other layover length: connection checker.

Best time to fly

LAS → SFO flights departing 5–9 AM arrived on time 75.0% of the time, against 54.3% for 6–9 PM departures, a gap of 20.7 percentage points.

By day and hour

On-time arrival rate for each weekday and scheduled departure hour, in local time at the departure airport (LAS).

Hour of departure matters more than day of the week: hourly averages sit a typical 12.1 points from the route-wide rate, weekday averages 5.1 points.

On-time arrival rate for LAS to SFO by weekday and scheduled departure hour, local time. Each button reads out one slot.
Hour	Monday	Tuesday	Wednesday	Thursday	Friday	Saturday	Sunday
6 AM–7 AM
7 AM–8 AM
8 AM–9 AM
9 AM–10 AM
10 AM–11 AM
11 AM–12 PM
12 PM–1 PM
1 PM–2 PM
2 PM–3 PM
3 PM–4 PM
4 PM–5 PM
5 PM–6 PM
6 PM–7 PM
7 PM–8 PM
8 PM–9 PM
9 PM–10 PM
10 PM–11 PM

On-time rate, % · stronger color, fewer on time

40–49
50–59
60–69
70–79
80–89
90–99

Fewer than 120 flights, not scored

Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · On time is arrival within 15 minutes of schedule. Cells round to whole percentages; the table shows one decimal.

No slot is named best or worst: too few reach 500 flights. Departures before 6 AM and after 11 PM (283 flights) are not drawn: no slot in those hours has enough flights to score.

View as tableHide table

On-time arrival rate (%) with flights beneath, by scheduled departure hour and weekday for LAS to SFO. A dash means fewer than 120 flights, which are not scored.
Hour	Monday	Tuesday	Wednesday	Thursday	Friday	Saturday	Sunday
6 AM–7 AM	93.0% on time303 flights	96.0% on time224 flights	96.8% on time220 flights	94.1% on time273 flights	94.7% on time304 flights	96.0% on time254 flights	93.2% on time297 flights
7 AM–8 AM	56.9% on time249 flights	67.0% on time198 flights	63.0% on time201 flights	59.5% on time250 flights	54.7% on time249 flights	69.8% on time271 flights	72.1% on time250 flights
8 AM–9 AM	56.7% on time164 flights	56.7% on time181 flights	59.2% on time170 flights	51.3% on time159 flights	58.3% on time158 flights	62.2% on time143 flights	49.0% on time160 flights
9 AM–10 AM	52.1% on time120 flights	71.9% on time122 flights	67.7% on time129 flights	118 flights, too few to score	63.8% on time127 flights	118 flights, too few to score	103 flights, too few to score
10 AM–11 AM	60.5% on time196 flights	66.9% on time140 flights	67.3% on time158 flights	65.9% on time185 flights	57.9% on time180 flights	73.1% on time147 flights	61.3% on time197 flights
11 AM–12 PM	72.7% on time189 flights	86.8% on time153 flights	75.3% on time158 flights	71.3% on time182 flights	71.6% on time193 flights	84.6% on time189 flights	70.0% on time201 flights
12 PM–1 PM	117 flights, too few to score	102 flights, too few to score	91 flights, too few to score	62.8% on time121 flights	116 flights, too few to score	92 flights, too few to score	98 flights, too few to score
1 PM–2 PM	69.8% on time175 flights	75.9% on time142 flights	69.3% on time140 flights	61.4% on time171 flights	68.4% on time172 flights	77.3% on time150 flights	62.1% on time184 flights
2 PM–3 PM	83 flights, too few to score	72 flights, too few to score	61 flights, too few to score	100 flights, too few to score	88 flights, too few to score	104 flights, too few to score	86 flights, too few to score
3 PM–4 PM	68.4% on time191 flights	73.7% on time226 flights	66.5% on time230 flights	54.2% on time183 flights	59.3% on time190 flights	73.8% on time169 flights	65.8% on time150 flights
4 PM–5 PM	110 flights, too few to score	77.7% on time130 flights	77.9% on time122 flights	70.2% on time124 flights	107 flights, too few to score	78.8% on time152 flights	64.0% on time141 flights
5 PM–6 PM	95 flights, too few to score	94 flights, too few to score	86 flights, too few to score	109 flights, too few to score	107 flights, too few to score	89 flights, too few to score	56.6% on time131 flights
6 PM–7 PM	58.6% on time179 flights	104 flights, too few to score	102 flights, too few to score	50.0% on time165 flights	50.0% on time181 flights	69.9% on time125 flights	46.2% on time145 flights
7 PM–8 PM	46.5% on time203 flights	61.4% on time191 flights	51.2% on time210 flights	43.7% on time225 flights	49.2% on time204 flights	64.1% on time210 flights	45.7% on time226 flights
8 PM–9 PM	49.3% on time143 flights	115 flights, too few to score	68.4% on time133 flights	47.1% on time138 flights	50.7% on time138 flights	72 flights, too few to score	102 flights, too few to score
9 PM–10 PM	103 flights, too few to score	82 flights, too few to score	87 flights, too few to score	116 flights, too few to score	113 flights, too few to score	56 flights, too few to score	89 flights, too few to score
10 PM–11 PM	106 flights, too few to score	28 flights, too few to score	28 flights, too few to score	103 flights, too few to score	51.2% on time126 flights	55 flights, too few to score	53.2% on time192 flights

By departure window

5–9 AM75.0%

9 AM–12 PM69.0%

12–3 PM66.4%

3–6 PM67.5%

6–9 PM54.3%

9 PM–5 AM55.5%

By departure hour

12 AM

3 AM

6 AM

9 AM

12 PM

3 PM

6 PM

9 PM

Why LAS → SFO runs late

July 2023 – July 2026

Air traffic control44.6%

airspace and airport capacity, including weather-driven flow control

Late-arriving aircraft33.6%

the inbound aircraft was late, so this flight started late

The airline19.9%

crew, maintenance, boarding and fueling, all within the carrier’s control

Weather1.9%

weather severe enough to stop this flight specifically

Security0.1%

screening or terminal security incidents

Share of the delay minutes US DOT attributed to each cause for LAS → SFO. Only delays of 15 minutes or more are attributed.

How this route holds up in bad weather

July 2023 – July 2026

Bad weather raises cancellations by a similar amount at both ends of LAS to SFO: 2.4 times the normal rate at LAS and 1.7 times at SFO. Cancelled in bad weather against normal hours: LAS 2.0% against 0.8%, SFO 1.5% against 0.9%. Flights that did leave LAS in bad weather arrived on time 58.5% of the time, against 78.5% in normal hours.

Bad weather and normal hours at the airports

Scheduled departures, July 2023 – July 2026

Departures from LAS and SFO in hours of bad weather and in normal hours
Departures from	LAS	SFO
Cancelled in bad weather	2.0%	1.5%
Cancelled in normal hours	0.8%	0.9%
Arrived on time, bad weather	58.5%	73.0%
Arrived on time, normal hours	78.5%	79.8%
Departures in bad weather	14,522	36,006

Of the carriers on this route, United Airlines (1.0% cancelled against 2.0% for the other carriers at LAS) cancelled the fewest departures from LAS in bad weather and Frontier Airlines (4.0% cancelled against 1.8% for the other carriers at LAS) the most. 2 more carriers fly this route but has too few bad-weather departures from LAS to compare.

This route’s airlines in bad weather at LAS

All departures from LAS

Cancellation rates in bad weather at LAS for the airlines that fly LAS to SFO, against the other carriers at LAS in the same months
Airline	Bad-weather departures	Cancelled	Other carriers
United Airlines	1,215	1.0%below the others	2.0%
Southwest Airlines	6,925	2.0%about level	2.1%
Frontier Airlines	943	4.0%above the others	1.8%

These are airport figures, not route figures: every scheduled departure from LAS and SFO, to any destination, in hours the weather report called bad. The airline rows count each carrier’s departures from LAS on every route.

Weather source and limits. In full: LAS (airlines), SFO, What Weather Costs Each Airport, Who Cancels More When the Weather Turns, Airports That Change Places When Weather Turns.

Airlines on this route

Carriers with at least 200 flights, by the airline that operated each one.

Airlines on this route
Carrier	Flights	On time	Cancelled	Median delay	Severe
United Airlines	7,609	72.3%	0.93%	-4 min	8.8%
Southwest Airlines	4,063	55.2%	0.42%	10 min	13.2%
Frontier Airlines	3,052	64.7%	1.41%	-1 min	12.4%
Alaska Airlines	2,949	68.7%	1.70%	-1 min	9.1%
SkyWest Airlines	582	63.9%	0.69%	5 min	13.0%

United Airlines flew 41.7% of the 18,255 flights listed. Alaska Airlines cancelled 1.70% of its flights here against 0.42% for Southwest Airlines.

United Airlines arrived on time 17.1 percentage points more often than Southwest Airlines on this route.

Other ways to fly Las Vegas to San Francisco

Airport pairs in the same two city markets, as the DOT defines them.

Other ways to fly Las Vegas to San Francisco
Route	Flights	On time	Cancelled	Median delay	Score
LAS→SFO this route Las Vegas to San Francisco	18,262	66.4%	1.01%	0 min	49
LAS→SJC Las Vegas to San Jose	13,257	80.6%	0.59%	-7 min	77
LAS→OAK Las Vegas to Oakland	12,992	75.4%	0.58%	-3 min	67

LAS → SJC is the most reliable pairing for this journey at 80.6% on time, against 66.4% for LAS → SFO.

Flights on this route

Flight numbers with at least 600 operations here and still on the schedule.

Flights on this route
Flight	Scheduled	Operations	On time
UA574 United Airlines	12:10 PM	1,030	76.2%
AS613 Alaska Airlines	7:00 AM	926	72.3%
UA2356 United Airlines	8:00 AM	789	61.1%
F93019 Frontier Airlines	8:00 AM	742	64.8%
F94401 Frontier Airlines	7:33 PM	695	54.9%

UA574 (12:10 PM) arrived on time 76.2% of the time, 21.3 points more often than F94401 (7:33 PM) at 54.9%.

Weekly and seasonal patterns

By day of week

Mon63.7%

Tue73.1%

Wed69.3%

Thu61.5%

Fri61.9%

Sat74.8%

Sun62.9%

Saturday is historically the most reliable day and Thursday the least, a gap of 13.3 percentage points.

By month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

May is historically the weakest month and January the strongest, a spread of 20.6 percentage points.

Reliability over time

July 2023 – July 2026

24

25

26

Over the most recent 12 months (2025-08 to 2026-07), on-time arrivals averaged 60.6% against 73.2% in the 12 months before — declining by 12.6 percentage points.

Data and methodology

Calculated by FlyerIntel from 18,262 LAS → SFO flight records from the US DOT Bureau of Transportation Statistics, covering July 2023 – July 2026. Late means 15 or more minutes past scheduled arrival; cancelled and diverted flights are left out of on-time rates.

Full methodology · Data sources · Report a problem

Analysis last recomputed September 26, 2026

LAS airport SFO airport Return direction SFO → LAS

LAS→SFO

Right now

Route reliability

What stands out

Why LAS → SFO flights are cancelled

Share of cancellations

What each reason means

When it goes wrong

Will your connection be tight enough?

Best time to fly

By day and hour

By departure window

By departure hour

Why LAS → SFO runs late

How this route holds up in bad weather

Bad weather and normal hours at the airports

This route’s airlines in bad weather at LAS

Airlines on this route

Other ways to fly Las Vegas to San Francisco

Flights on this route

Weekly and seasonal patterns

By day of week

By month

Reliability over time

Data and methodology